Does FROZEN Homage WATCHMEN?

In Frozen Elsa, the Queen of Arendelle, flees her kingdom after accidentally using her hidden frost powers. She runs off to the mountains and, in a spectacularly animated sequence, raises a clockwork ice castle into the skies. As I was watching I couldn't help but think of another clockwork fortress erected by another powerful being who fled his people: Dr. Manhattan in Watchmen.

I wasn't alone in noting the similarities; I forgot all about it until Drew Pearce, screenwriter of Iron Man Three, noted:

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